# Indices

Source: https://projectalevel.co.uk/maths/algebra/indices

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The following is a summary of the important rules of indices:

![rules and examples](https://content.projectalevel.co.uk/img/maths/indices.gif)

![indices](https://content.projectalevel.co.uk/img/maths/indices2.gif)

#### **Exponential functions**

- Functions of the form:

![Exponential functions](https://content.projectalevel.co.uk/img/maths/indices3.gif)

- are known as exponential functions.
- The graphs of all such exponential functions pass through (0, 1).
- The function of y = e(to the power x) is known as the exponential function. The inverse of this function is y = loge x = ln x .